Mautic, Insecure Direct Object Reference (IDOR), CVE-2023-XXXX (Critical)

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How the CVE Works

The vulnerability resides in Mautic’s segment cloning functionality (cloneAction in ListController.php). An authenticated attacker can exploit this flaw due to missing authorization checks when cloning segments. Normally, only users with “create” permissions should clone segments, but the lack of validation allows any authenticated user—regardless of privileges—to perform unauthorized cloning. This IDOR vulnerability enables privilege escalation, data manipulation, and potential exposure of sensitive segment configurations. Attackers can abuse this to replicate segments containing confidential customer data, leading to unauthorized access or data exfiltration.

DailyCVE Form

Platform: Mautic
Version: <4.4.0
Vulnerability: IDOR
Severity: Critical
Date: 2023-XX-XX

Prediction: Patch expected Q1 2024

What Undercode Say:

Exploitation:

1. Craft Malicious Request: Use a low-privilege account to send a POST request to /s/segments/clone/{id}.

   curl -X POST 'http://<mautic>/s/segments/clone/123' -H 'Cookie: <session>'
   

2. Bypass Checks: The endpoint fails to verify if the user has `segment:create` permissions.

Detection:

• Audit logs for unexpected segment cloning:

  SELECT FROM audit_log WHERE action LIKE '%clone%' AND user_id NOT IN (SELECT id FROM users WHERE permissions LIKE '%segment:create%');
  

Mitigation:

1. Patch: Upgrade to Mautic 4.4.0+.

1. Temporary Fix: Override `cloneAction` with a permission check:

   public function cloneAction($id) {
   if (!$this->get('mautic.security')->isGranted('segment:create')) {
   return $this->accessDenied();
   }
   return parent::cloneAction($id);
   }
   

2. Network Controls: Restrict segment API access to admin IPs:

   location ~ ^/s/segments/clone {
   allow 192.168.1.0/24;
   deny all;
   }
   

Forensics:

• Check segment revisions for unauthorized clones:

  grep -r "cloned_from" /var/www/mautic/segments/
  

Impact Analysis:

• Segments containing PII or campaign triggers are high-risk targets.
• Exploits may chain with XSS to steal admin sessions during cloning.

References:

• Mautic Commit:
• CWE-862: Missing Authorization.

Sources:

Reported By: github.com
Extra Source Hub:
Undercode

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